Could you also make this "doğrudur"? or would that be wrong?
It would be and is accepted :)
I used kesinlikle instead of tamamen but it didn't accept it. Is there a big difference?
Kesinlikle means "definitely". So if you use it, it will be "This is definitely correct"
would ''tam olarak'' be accepted
Nope, that is "exactly" :)
I used bütün insted of tamamen . is it wrong
It is wrong. Tamamen = completely, bütün = all,whole
Why is"mutlaka" unacceptable?
Mutlaka means "absolutely". But I should say , 'Bu mutlaka doğru" doesn't sound that natural
Tamamen is an arabic word